NEUTRALIZATION OF CONCRETE

PROBLEM TO BE SOLVED: To provide a method for neutralizing concrete, capable of uniformly neutralizing the surface and space wall surfaces of the applied concrete without relating to the wet or dry state of the concrete. SOLUTION: This method for neutralizing concrete comprises spraying a highly concentrated water-soluble water-repelling agent in a container 4 together with carbon dioxide in a gas cylinder 3 on the surface of the applied concrete 2 by use of a sprayer 5, covering the applied concrete 2 with a sheet, charging carbon dioxide into a space between the applied concrete 2 and the sheet from the gas cylinder 3 and subsequently leaving the charged carbon dioxide for a considerable period (for example, a whole day and night).